(Un)loading speed and time delay parameters introduced into GUI and conf. layer (not yet into wipe tower generator)

xs/src/libslic3r/GCode/WipeTowerPrusaMM.cpp

@@ -845,7 +845,11 @@ void WipeTowerPrusaMM::toolchange_Unload(
 	//writer.retract(15, 5000).retract(50, 5400).retract(15, 3000).retract(12, 2000);
 
     // Pull the filament end to the BEGINNING of the cooling tube
-    writer.retract(15, 5000).retract(m_cooling_tube_retraction+m_cooling_tube_length/2.f-42, 5400).retract(15, 3000).retract(12, 2000);
+    float unloading_feedrate = 5400.f; // Alex's original feedrate was 5400
+    writer.retract(15, 5000)    // just after ramming - fixed speed
+          .retract(m_cooling_tube_retraction+m_cooling_tube_length/2.f-42, unloading_feedrate)
+          .retract(15, unloading_feedrate*0.55f)
+          .retract(12, unloading_feedrate*0.35f);
 
 
 	if (new_temperature != 0) 	// Set the extruder temperature, but don't wait.
@@ -953,17 +957,14 @@ void WipeTowerPrusaMM::toolchange_Load(
 	float oldx = writer.x();	// the nozzle is in place to do the first wiping moves, we will remember the position
 	float oldy = writer.y();
 
-	writer.append("; CP TOOLCHANGE LOAD\n")
-	// Load the filament while moving left / right,
+    // Load the filament while moving left / right,
 	// so the excess material will not create a blob at a single position.
+    float loading_feedrate = 3000.f;
+	writer.append("; CP TOOLCHANGE LOAD\n")
 		  .suppress_preview()
-		  // Accelerate the filament loading
-		  .load_move_x(xr, 20, 1400)
-		  // Fast loading phase
-          //.load_move_x(xl, 40, 3000) - Alex
-		  .load_move_x(xl,m_parking_pos_retraction-50-2,3000) // loading is 2mm shorter that previous retraction
-		  // Slowing down
-		  .load_move_x(xr, 20, 1600)
+		  .load_move_x(xr, 20, 1400)  // Accelerate the filament loading
+		  .load_move_x(xl,m_parking_pos_retraction-50-2,3000) // Fast phase - loading is 2mm shorter that previous retraction
+		  .load_move_x(xr, 20, 1600)    // Slowing down
 		  .load_move_x(xl, 10, 1000)
 		  .travel(oldx,oldy)
 		  .resume_preview();

xs/src/libslic3r/PrintConfig.cpp

@@ -448,6 +448,33 @@ PrintConfigDef::PrintConfigDef()
     def->min = 0;
     def->default_value = new ConfigOptionFloats { 0. };
 
+    def = this->add("filament_loading_speed", coFloats);
+    def->label = _L("Loading speed");
+    def->tooltip = _L("Speed used for loading the filament on the wipe tower. ");
+    def->sidetext = _L("mm\u00B3/s");
+    def->cli = "filament-loading-speed=f@";
+    def->min = 0;
+    def->default_value = new ConfigOptionFloats { 0. };
+
+    def = this->add("filament_unloading_speed", coFloats);
+    def->label = _L("Unloading speed");
+    def->tooltip = _L("Speed used for unloading the filament on the wipe tower (does not affect "
+                      " initial part of unloading just after ramming). ");
+    def->sidetext = _L("mm\u00B3/s");
+    def->cli = "filament-unloading-speed=f@";
+    def->min = 0;
+    def->default_value = new ConfigOptionFloats { 0. };
+
+    def = this->add("filament_toolchange_delay", coFloats);
+    def->label = _L("Delay after unloading");
+    def->tooltip = _L("Time to wait after the filament is unloaded. "
+                   "May help to get reliable toolchanges with flexible materials "
+                   "that may need more time to shrink to original dimensions. ");
+    def->sidetext = _L("s");
+    def->cli = "filament-toolchange-delay=f@";
+    def->min = 0;
+    def->default_value = new ConfigOptionFloats { 0. };
+
     def = this->add("filament_diameter", coFloats);
     def->label = _L("Diameter");
     def->tooltip = _L("Enter your filament diameter here. Good precision is required, so use a caliper "

xs/src/libslic3r/PrintConfig.hpp

@@ -466,6 +466,9 @@ public:
     ConfigOptionBools               filament_soluble;
     ConfigOptionFloats              filament_cost;
     ConfigOptionFloats              filament_max_volumetric_speed;
+    ConfigOptionFloats              filament_loading_speed;
+    ConfigOptionFloats              filament_unloading_speed;
+    ConfigOptionFloats              filament_toolchange_delay;
     ConfigOptionBool                gcode_comments;
     ConfigOptionEnum<GCodeFlavor>   gcode_flavor;
     ConfigOptionString              layer_gcode;
@@ -518,6 +521,9 @@ protected:
         OPT_PTR(filament_soluble);
         OPT_PTR(filament_cost);
         OPT_PTR(filament_max_volumetric_speed);
+        OPT_PTR(filament_loading_speed);
+        OPT_PTR(filament_unloading_speed);
+        OPT_PTR(filament_toolchange_delay);
         OPT_PTR(gcode_comments);
         OPT_PTR(gcode_flavor);
         OPT_PTR(layer_gcode);